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1 year ago

Compare the atomic sizes of sodium and magnesium. Explain.

Chemistry

1 answer:

mihalych1998 [28]1 year ago

5 0

<u>Answer:</u>

Sodium atom is larger than Magnesium atom.

<u>Explanation:</u>

Looking at the electronic configurations of Sodium and Magnesium:

$_{11}Na: 1s^2 2s^2 p^6 3s^1\\\\_{12}Mg : 1s^2 2s^2 p^6 3s^2$ ,

we can see that they both have their valence electrons in the 3rd shell.

But because Magnesium has a higher nuclear charge of +12 because of its 12 protons than that of Sodium's +11, the nucleus of Magnesium attracts its outer electrons more strongly than Sodium does. This makes the Magnesium atom smaller.

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2 years ago

A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t

777dan777 [17]

The molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = $\frac{A}{cl}$

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Performing multiplication in denominator to find the value of molar extinction coefficient

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Performing division to find the value of molar extinction coefficient

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1 year ago

Which equation agrees with ideal gas law?

Julli [10]

Https://www.gstatic.com/education/formulas2/355397047/en/boyle_s_law.svg

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2 years ago

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3 years ago

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olga nikolaevna [1]

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The reaction is as shown in the image.

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3 years ago

Compare the atomic sizes of sodium and magnesium. Explain. ​

Compare the atomic sizes of sodium and magnesium. Explain.